What is CVE-2026-19311?

CVE-2026-19311 is a high-severity vulnerability in Aws Opensearch, classified under CWE-475. CVSS score: 8.1/10. Published 2026-08-12.

How severe is CVE-2026-19311?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Aws Opensearch

CVE-2026-19311

Missing authorization in the Execute Monitor API in Amazon OpenSearch Alerting plugin might allow an authenticated remote user to read, modify, or delete arbitrary index data via a crafted inline monitor request with unintentional data sou…

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Aws Opensearch — versions 2.4
Github Opensearch — versions 2.4.0, 3.0.0

Weakness classification (CWE)

CWE-475

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)

Frequently asked questions

What is CVE-2026-19311?: CVE-2026-19311 is a high-severity vulnerability in Aws Opensearch, classified under CWE-475. CVSS score: 8.1/10. Published 2026-08-12.
How severe is CVE-2026-19311?: High severity. CVSS v3 base score is 8.1 out of 10.